UnivieSearchPageProcessor.java
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package com.canrd.webmagic.processor;
import com.canrd.webmagic.processor.config.Agent;
import com.canrd.webmagic.processor.download.SeleniumDownloader;
import com.canrd.webmagic.processor.pipeline.ArticlePipeline;
import lombok.extern.slf4j.Slf4j;
import org.apache.logging.log4j.core.util.UuidUtil;
import org.springframework.stereotype.Component;
import us.codecraft.webmagic.Page;
import us.codecraft.webmagic.Site;
import us.codecraft.webmagic.Spider;
import us.codecraft.webmagic.processor.PageProcessor;
import us.codecraft.webmagic.selector.Selectable;
import us.codecraft.webmagic.selector.XpathSelector;
import javax.annotation.Resource;
import java.util.List;
/**
* https://www.univie.ac.at/suche/?q=battery
*
* @author: xms
* @description: TODO
* @date: 2024/4/1 14:19
* @version: 1.0
*/
@Slf4j
@Component
public class UnivieSearchPageProcessor implements PageProcessor {
@Resource
private Univie4PhysnanoArticlePageProcessor univie4PhysnanoArticlePageProcessor;
@Resource
private SeleniumDownloader seleniumDownloader;
@Resource
private ArticlePipeline articlePipeline;
/**
* 抓取网站的相关配置，包括编码、抓取间隔、重试次数等
*/
private Site site = Site.me().setRetryTimes(3).setSleepTime(5).setUserAgent(Agent.getRandom());
/**
* 定制爬虫逻辑的核心接口，在这里编写抽取逻辑
*
* @param page
*/
@Override
public void process(Page page) {
doSearch(page);
}
/**
* @param page
*/
private void doSearch(Page page) {
String url = page.getUrl().get();
/**
* 通过page.getHtml()可以获取到main函数中Spider.create(new BaiduHotSearchPageProcessor()).addUrl中的地址的网页内容
* 1、通过$或css()方法获取到该page html下某元素dom
*/
Selectable selectable = page.getHtml().xpath("//div[@class='univie-search']").xpath("//div[@class='content-element-margin-small yacy-result']");
List<Selectable> nodes = selectable.nodes();
/**
* 获取到指定的dom后，从这些dom中提取元素内容。
*/
for (int i = 0; i <= nodes.size() - 1; i++) {
String link = nodes.get(i).links().get();
String title = nodes.get(i).xpath("//a/h2/text()").get();
if (link.contains(".pdf") || link.contains(".docx")) {
continue;
}
if (link.contains("physnano.univie.ac.at/publications/publication-detail/pure")) {
log.info("关键字文章列表链接：{},标题:{},文章链接：{}", url, title, link);
Spider.create(univie4PhysnanoArticlePageProcessor)
.addUrl(link)
.addPipeline(articlePipeline)
// .setDownloader(seleniumDownloader)
.setUUID(UuidUtil.getTimeBasedUuid().toString())
// 开启5个线程执行，并开始爬取
.thread(1).run();
}
}
}
@Override
public Site getSite() {
return site;
}
}